Use of my address without permission

I'm perhaps presuming but I'm wondering if this is in connection with nationality in some way?.... I'd urge caution and suggest taking advice.

www.gov.uk/register-birth/ lots of info about the process here.
I can’t think what this person hopes to achieve. Or how you can be at fault.

Thank everyone for replying. I shall take advice given. It will cause such a commotion if the family concerned find out that I have been chatting on here.

The only address on a birth certificate is that of the Mother.

Why not go to Citizen's Advice or Age UK tell them the full story. They will keep anything you say confidential, and be sure of the answer you get. With one exception we are not lawyers, we cannot advise on the law. Especially on a subject as arcane as this and with so little information about what exactly is being done.

calling GSM, come in GSM.
but until then OP, i'm not quite sure what you mean.
is someone going to falsify details given to a registrar ?
that would cert be a criminal offence, and you should inform the registrar pronto.
is it place of birth, or address details of a parent ?
i suggest you contact your local registrars office, or the one relevant to the certificate.
ask their advice.
if someone is threatening you, or you feel intimidated, contact police on 101.
all the best.